Blue mold spring:

Blue mold spring compression deformation in 32%, 36%, 40% range, mold spring is a heavy load compression spring, made of rectangular section steel wire, rectangular section mold spring compared with circular section spring, in the same space, the cross-sectional area of the rectangular section spring is large, so its stiffness is large, can be used as a heavy spring. The stiffness of the die spring with a rectangular section is also close to a straight line, so the stiffness is relatively stable.

Network optimization materials:

category

This part requires the technical standards, specifications, appearance design and allowable errors, experimental methods, testing standards and other regulations for the purchase of cold-rolled coil cylindrical spiral spring (hereinafter referred to as elastic yellow). Nitrogen elastic yellow is indispensable for automatic door closing device, and relevant provisions should be based on the technical engineering drawings of the elastic yellow of the enterprise as the standard.

Commodity technical standard

2.1 Material requirements: oil heat treatment quenched silicon manganese spring steel 60Si2MnA-C; The raw material quality of special-shaped spring should meet the requirements of GB/T18983-2003 oil heat treatment hardened spring steel.

2.2 Elastic yellow structure: cylindrical spiral press spring, both sides and tightly ground off, any inner hole and elastic yellow pivot Angle error is not more than 1.5°, support ring wear off part of not less than 3/4 circle, edge thickness is not less than 1/8d, rotation orientation is based on technical engineering drawings as the standard.

in Wenwen

2.3 Size and appearance:

2.3.1 Tolerance Error and Concentricity of stainless steel wire diameter: